Siv ferrous sulfate kho tailings hauv kub mines

Cov tailings ntawm kub mines muaj ntau tus nqi ntawm cyanide. Txawm li cas los xij, cov ferous ions nyob rau hauv ferrous sulfate tuaj yeem hnov ​​cov cyanide dawb hauv cov tailings, thiab tsim cov cailoal ferrous thiab lwm yam tshuaj. Cov tshuaj tiv thaiv no yuav cuam tshuam nws cov tshuaj tiv thaiv tshwm sim nyob rau hauv qee yam kev mob sab nraud. Piv txwv li, kev kho mob ntawm cyanide-muaj cov dej khib nyiab nrog ferrous sulfate nyob rau hauv kub, thiab ultraviolet iradiation yuav cuam tshuam rau cov tshuaj tiv thaiv. Ferrous cynaide yog tsis ruaj khov, thiab thaum lub sij hawm tsis ruaj khov, ferrous cyanide daws tau yooj yim saib, ua rau muaj kuab paug hauv av. Cia peb tshwj xeeb txheeb xyuas cov tshuaj tiv thaiv cov txheej txheem thiab cov txiaj ntsig ntawm kev ntxiv cyanide rau ferrous sulfate. Cia peb ua ib qho kev sim kom ntxiv cyanide thaum muaj ntau ntawm ferrous sulfate. Uas yog hais, thaum tshaj ferrous sulfate tau ntxiv rau cyanide tov, cyanide yuav tig mus rau hauv insoluble precipally FEA4 [FE (uas peb feem ntau hu prussian xiav. Ntawm chav kawm, nyob rau hauv cov txheej txheem ntawm kev kho caj dab hauv cov nyiaj kub, qee cov tuam txhab tsis xaiv ferrous sulfate rau kev kho mob, tab sis xaiv los ntxiv ferrous sulfide. Qee cov tuam txhab xaiv ntxiv cov hlau thiab tooj rau tib lub sijhawm los ua kom dawb insoluble frealle cynanide. Ferrous hlau sai tau nqus cov pa oxygen los ntawm huab cua, hloov xiav tsaus, thiab ua ferric ferricryide.

Nws tuaj yeem xaus lus los ntawm kev sim uas yog qhov kev mob zoo tshaj plaws rau kev tshem cov cyanide los ntawm ferrous sulfate yog nrhiav cov txheej txheem soluble thiab insoluble tebchaw. Thaum lub sij hawm sim, peb tau suav cov qhab nees maum mos ntawm cov tshuaj tiv thaiv cov tshuaj tiv thaiv ntawm ferrous sulfate thiab cn-. Ua ntej, qhov sib piv tau xam raws li Stoichiometry yog 0.39, tab sis cov kev piv ntawm cov nplhaib zoo uas peb tau txais los ntawm kev laij yog 0.5. Cov. Qhov zoo tshaj plaws ph txog nag cov npe nrov prussian yog 5.5 txog 6.5. Feem ntau hais lus, oxygen tuaj yeem ua hlau ions los ua ferricyanide thiab ferriciously ions, uas yog qhov tsis txaus ntseeg rau kev tshem tawm ntawm cyanide. Vim tias ferricynate ion yog tsis ruaj khov nyob rau hauv acidic mob, nws yuav hnov ​​cov ferrous pentacyano complexide [FE (cn) ) 63-. Cov kev tawm tsam no tshwm sim ntawm PT qhov tseem ceeb hauv qab no 4. Tom qab peb tau hais txog kev kho mob rau kub. Thaum kawg ib puag ncig kev kho mob kom tshem tawm cov cyanide los ntawm cov tailings yog tus nqi pH ntawm 5.5 txog 6.5. Tus lej sau nqi yog qhov tsim nyog tshaj plaws, thiab cov piv ntawm FE rau CN-0.5 yog qhov tsim nyog rau kev ua.